I had a late 2017 75D. I tested it at the same place through out its life, result had been pretty consistent. The 100D is barely any faster at launch, but once you get over 40mph. The 100D will just blow the 75D away, it feels that way in the car too.
One of the S guys logged the data, the peak power and motor are basically the same between the two cars. The 100D just allows for the same power output at higher speed where the 75 will drop off over 40
The 100D will be quicker for sure, but lets not forget the 75D is no slouch in the real world.
Infact real world 'in gear' performance is the same as a previous gen M3 and Ferrari 355 open top. Bare in mind our 75D is a 6 seater, and in theory one of the slowest cars Tesla sell, thats not bad performance!